火焰原子吸收光谱法测定薤白中铁·钙·锰·铬·镍和铜的含量

[目的]测定薤白中铁、钙、锰、铬、镍和铜的含量。[方法]以牡丹江市西山野生的薤白为原料,考察湿式消化法和干式灰化法对样品的处理情况,并采用火焰原子吸收光谱法测定薤白中铁、钙、锰和铬等元素的含量,并进行精密度和回收率试验。[结果]薤白中含有多种人体所必需的营养元素,且其中的钙含量较高,为1.240 7 mg/g;铁的含量居中,为0.201 7 mg/g;锰、铬含量较少,而镍、铜则几乎检测不到。[结论]该方法具有省时、省力、灵敏度高、分析速度快、准确等优点,可用于薤白中常量和微量元素的分析。

Determination of Iron, Calcium, Manganese, Chromium, Nickel and Copper in Allium macrostemon by AAS

[Objective] To measure the content of iron,calcium,manganese,chromium,nickel and copper in Allium macrostemon.[Method] An investigation about the effects of wet digestion and dry ashing method on the determination results were performed on raw material A.macrostemon,sampled from Xishan Mountain in Mudanjiang City.Atomic absorption spectrometry(AAS) was adopted to determine the content of iron,calcium,manganese,chromium,nickel and copper in A.macrostemon.Precision test and recovery test were made.[Result] A.macrostemon contained many kinds of nutrient elements that were essential to human body,among which the content of calcium was the highest at 1.240 7 mg/g,of iron was the middle,of manganese and chromium was the lowest.Besides,nickel and copper could not be detected.[Conclusion] This method has the advantages of time-saving,labor-saving,high sensitivity,fast speed of analysis,and high accuracy,so that it is fit for the analysis of constant and trace elements in A.macrostemon.